| 钢桥焊接构件疲劳寿命预测 |
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| 引用本文： | 陈惟珍,G.Albrecht,D.Kosteas.钢桥焊接构件疲劳寿命预测[J].同济大学学报(自然科学版),2001,29(1):45-49. |
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| 作者姓名： | 陈惟珍 G.Albrecht D.Kosteas |
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| 作者单位： | 1. 同济大学桥梁工程系
2. 慕尼黑工业大学土木系, |
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| 摘 要： | 分析了影响焊接接头疲劳寿命的各种因素，在Dugdale模型基础上构造裂纹闭合模型，并将其应用到焊接接头的表面半椭圆形裂纹，其中考虑了影响区的材性变化、焊接残余应力以及焊缝几何带来的应力集中，通过与两个试验结果的比较表明：该法能估计裂纹扩展阶段的疲劳寿命，可用于焊接钢桥抗疲劳设计。
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| 关 键 词： | 疲劳寿命 钢桥 焊接缺陷 裂纹闭合模型 焊接接头 裂纹扩展模拟 疲劳断裂 预测 |
| 文章编号： | 0253-374(2001)01-0045-05 |
| 修稿时间： | 2000年3月10日 |
Fatigue Life Prediction for the Welded Members in Steel Bridges |
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| CHEN Wei zhen ,G.Albrecht ,D.Kosteas.Fatigue Life Prediction for the Welded Members in Steel Bridges[J].Journal of Tongji University(Natural Science),2001,29(1):45-49. |
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| Authors: | CHEN Wei zhen GAlbrecht DKosteas |
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| Institution: | CHEN Wei zhen 1,G.Albrecht 2,D.Kosteas 2 |
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| Abstract: | In this paper the various factors affecting the fatigue life of welded joints are analyzed.Based on the Dugdale model a crack closure model has been established and applied to the surface half elliptical crack in welded joints.The changes of material behavior in HAZ(heat affecting zone),the residual stress and the stress concentration due to the weld profile have been taken into account.The comparison with two experiments shows that the method proposed in this paper can predict the fatigue life of crack propagation in welded joints.It can be used for the fatigue design of steel bridges. |
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| Keywords: | welded joint fatigue life steel bridge |
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